This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 6 |
| 7 | 7 |
| 8 | 8 |
| 9 | 9 |
| 10 | 279972 |
| 11 | 2774772 |
| 12 | 5499945 |
| 13 | 25477452 |
| 14 | 27722772 |
| 15 | 254545452 |
| 16 | 277202772 |
| 17 | 279999972 |
| 18 | 2133333312 |
| 19 | 2522772252 |
| 20 | 2545225452 |
| 21 | 2772002772 |
| 22 | 4266666624 |
| 23 | 6399999936 |
| 24 | 21331413312 |
| 25 | 23466666432 |
| 26 | 25225452252 |
| 27 | 25452025452 |
| 28 | 25479997452 |
| 29 | 27720002772 |